My neighbor in 2001 used Home Dep. and one of their installers and got
duel pane, low e, etc...Vinyl replacement windows. My neighbor claims they did not remove the frames. I looked at them and I believe him since there's all kinds of molding coving things up on the inside. These windows
are held in by 2 screws on each side.

my question is, with these metal frames, can I do the same? or was what
he had done not a good idea. Neighbor says they are holding up fine and is satisfied.
I would like to replace them myself but not sure about if the I have to pull the frames off
thanks for any help